linux man page for userptr

userptr(3FORM)															    userptr(3FORM)

NAME

       form_userptr - associate application data with a form item

SYNOPSIS

       #include <form.h>
       int set_form_userptr(FORM *form, void *userptr);
       void* form_userptr(const FORM *form);

DESCRIPTION

       Every  form  and  every	form  item has a field that can be used to hold application-specific data (that is, the form-driver code leaves it
       alone).	These functions get and set the form user pointer field.

RETURN VALUE

       The function form_userptr returns a pointer (which may be NULL).  It does not set errno.

       The function set_form_userptr returns E_OK (success).

SEE ALSO

       ncurses(3NCURSES), form(3FORM).

NOTES

       The header file <form.h> automatically includes the header file <curses.h>.

PORTABILITY

       These routines emulate the System V forms library.  They were not supported on Version 7 or BSD versions.

       The user pointer is a void pointer.  We chose not to leave it as a char pointer for SVr4 compatibility.

AUTHORS

       Juergen Pfeifer.  Manual pages and adaptation for new curses by Eric S. Raymond.

																    userptr(3FORM)